Apparatus for making fibrous containers.



J. P. RAYMOND.

APPARATUS FOR MAKING FIBROUS CONTAINERS.

APPLICATION FILED JUNE 21. 191B" 1 ,28,928, Patented Nov. 12, 1918.

A ORNEY ori ces of the said molds.

JOHN P. RAYMOND, OF SAN FRANCISCO, CALIFORNIA.

APPARATUS FOR MAKING FIBROUS CONTAINERS.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed June 21, 1918. Serial No. 241,253.

To all whom it may concern:

Be it known that I, J OHN P. RAYMOND, a citizen of the United States, and a resident of the city and county of San Francisco and State of California. have invented an Improvement in an Apparatus for Making Fibrous Containers; and I do hereby declare the following to be a full, clear, and exact erate to dislodge the containers from the molds in which the same are made by breaking any contact which may be established between the containers and the molds during the time of their construction.

Heretofore in the manufacture of such containers by compressed air great difliculty has been experienced in removing the con-' tainers from the molds, and in breaking the contact between the containers and the molds in which the same are formed, because of the tendency of the pulp particles in the pul mixture to become embedded in the The apparatus as constructed 'by me overcomes this difficulty. y

In order that my invention may be clearly understood and readily carried into effect,-

the same is described with reference to the accompanying drawings, in which similar numerals indicate like parts Figure 1, is a side elevation of the complete structure.

Fig. 2, is a plan 'view of the mold looking downward.

In detail, my construction consists of a frame, 2, suitably supported, from which is dependent a moldv comprised of two parts, 3 and 4, which are suitably hinged at their upper central portions to a boss, 5, projecting downward from said frame. The two parts of the mold are thus adapted to swing upward and outward in opposite directions from each other when the mold is opened. The mold is provided with a bottom comprised of two parts, 6 and 7, suitably attached at their outer portions to the said parts, 3 and 4, respectively, by means of hinges, 8. When the mold is opened the said bottom parts swing downward and away from each other. By means of arms, 9, and stops, 10, the said hinged bottom parts are prevented from dropping too far when the mold is opened. The said mold is opened and closed by means of the lever, 11. A feed-pipe, 12, opens into the said mold through the said boss, 5. Through the said feed-pipe. moistened pulp, from which the containers are made, is admitted into the mold from a suitable reservoir (not shown in the drawings). Through this feed-pipe, also, air from a suitable compressor (not shown in the drawings) is admitted into the mold for the purpose of forming the containers. Lugs, 13, aflixed to the two hinged parts comprising the said bottom and adapted to contact with the triangle bars, 14, mounted on the said frame, 2, prevent the said mold from opening against the action of the compressed air when the said mold is closed and in use. The surfaces of the mold are provided with innumerable pores, '15, to permit the escape of the compressed air and the water held in the moistened pulp when the same are admitted into the mold and when the containers are being constructed.

For the purpose of dislodging the containers from the said mold and of breaking any contact which may have been established during the construction of the said containers between the pul particles comprised in the containers and the mold, -I rovide a vacuum tank, 16, operated bya suitable exhauster (not shown in the drawings) controlled by a quick-acting valve, 17, and connectcd with the said eed-pipe, 12, by a pipe-line, 18.

My apparatus is operated as follows: After the moistened pulp admitted into the mold has been formed into containers by the action of compressed air, the quick-acting valve, 17, is opened and connection established between the constructed container and the vacuum tank. The action of the vacuum thus applied to the interior of the container causes the said container to draw awayfrom the mold. Any pulp particles comprising the container, which during its construction mav have become embedded in the porous mold. are thereby drawn out of contact with the said mold, and the container is thus free to drop out of the mold by the actionof gravity when the said mold is opened.

Having thus described my invention, what I desire to claim and to secure by Letters Patent, is:

1. In an apparatus of the character described, a porous separable mold wherein fibrous containers are formed by con'lpressed air, in combination with means for applying vacuum to the interior of the finished article for purpose of dislodging the same from the said mold as a preliminary step to its discharge therefrom.

2. In an apparatus of the character described, a porous separable mold wherein fibrous containers are formed by compressed air, means for applying vacuum to the interior of said containers for thepurpose of breaking any contact which may have been established between said containers and said mold during the formation of the former therein as a preliminary step to the discharge of said containers from said mold.

3. In an apparatus of the character described, means for applying vacuum to the interior of fibrous containers for the purpose of dislodging the'same from the porous separable mold in which they are formed by the action of compressed air exerted against a quantityof moistened fibrous pulp held in said mold, and means for discharging the finished containers.

4. In an apparatus of the character described, a porous mold for fibrous containers dependent from a suitable frame, said mold being provided with separable parts adapted to swing outward and upward from each other and bottom parts adapted to swing downward so as to permit the discharge of said containers, means for dislodging the containers formed in said mold contemporaneously with their discharge therefrom, said means consistin of a vacuum exhauster provided with a suitable valveeontrolled connection between said vacuum exhauster and said mold, and means for operating the same.

5. In an apparatus of the character described, a porous separable mold wherein fibrous containers are formed by compressed air, in combination-with a suitable air exhauster connected with said mold by a suitable pipe-line whereby said containers are dislodged from the said mold, and a control-valve for said air .exhauster.

6. In an apparatus of the character described, a porous separable mold wherein fibrous containers are formed by the action of compressed air, in combination with a vacuum tank connected with said mold by a suitably valve-controlled pipe-line whereby said containers are dislodged from said mold prior to their discharge therefrom.

In testimony whereof I have hereunto affixed my signature.

JOHN P. RAYMOND. 

